Abstract: A lenticular lens sheet 4 comprises a plurality of lens elements of incidence 21 arranged on the incidence side, and a plurality of lens elements of emergence 22 arranged on the emergence side. The light that has passed through each lens element of incidence 21 converges via the protruding apex of the corresponding lens element of emergence 22. The lens plane of the center portion C of each lens element of emergence 22, the width of this portion C being a half of the total lens width L (i.e., L/2), is in the shape defined by a curved line fulfilling the conditions expressed by the following numerical formulae (1) to (4), and the lens plane of each side portion S of each lens element of emergence 22, the width of this portion S being a quarter of the total lens width L (i.e., L/4), is in the shape defined by a curved line fulfilling the conditions expressed by the following numerical formulae (5) to (8): y=a×b?x?e (?L/4?x?0) . . . (1), y=a×bx?e (0?x?L/4) . . . (2), 3.0×10?4<a<3.8×10?4 . . . (3), 1.

Abstract: A rear projection screen includes a first and second optical components. The second optical component includes a first surface on which a plurality of cylindrical convex portions are formed, and a second surface opposite to the first surface. In this case, a plurality of concave portions are formed on the second surface, and each concave portion is positioned respectively corresponding to the place between each cylindrical convex portion. A light absorbing material is applied to each concave portion. Furthermore, the invention also discloses an optical component and a method for manufacturing the optical component.

Abstract: A screen for a projector includes a Fresnel lens which concentrates incident light, a lenticular lens arranged on a front surface of the Fresnel lens and which forms an image by focusing light passing through the Fresnel lens, a protective panel installed on a front surface of the lenticular lens and which protects the lenticular lens, and a reflection reducing portion formed on one surface of the protective panel, wherein the reflection reducing portion reduces reflection of light by diffusely reflecting the light, and wherein the reflection reducing portion includes a core member capable of being emitted externally.

Abstract: Blends of oligomeric urethane multi(meth)acrylate; optionally at least one other monomer selected from the group consisting of acrylic monomers, styrenic monomers and ethylenically unsaturated nitrogen heterocycles, preferably a polyol multi(meth)acrylate; and nanoparticles of an ethylenically unsaturated, preferably (meth)acrylic-functionalized, titanium or zirconium compound can be cured by ultraviolet radiation in contact with a photoinitiator to produce optical resinous articles having high refractive indices, haze ratings of at most 5% and other properties which may be tailored according to the desired use.

Abstract: A rear projection screen 3 includes a single Fresnel lens sheet 11 having the function of converging projected light entering from its back side and allowing the converged light to emerge from its observation side, or a combination of the Fresnel lens sheet 11 provided on the back side and a lenticular lens sheet 21 provided on the observation side. The Fresnel lens sheet 11 has a Fresnel lens 12 on its observation-side surface and a matte surface 13 as its back-side surface. The matte surface 13 of the Fresnel lens sheet 11 has a specified degree of matting and shows antireflection properties. Preferably, the Fresnel lens sheet 11 has a haze value in a specified range. More preferably, the matte surface 13 of the Fresnel lens sheet 11 has a gloss in a specified range.

Abstract: A transmission screen has a refraction total reflection Fresnel lens plate 10C, a stray light eliminating plate 20, and an image display plate 30. The stray light eliminating plate 20 has a condensing lens array 21 and black stripes 23. The array 21 has unit lenses arranged at an incident plane of the transparent substrate 22 in a periodic structure in an up-and down direction. The black stripes 23 has transparent sections 201 placed near condensing light points of the unit lens and opaque sections 200 around the condensing light points of the unit lenses. The sections 201 and 200 are alternately arranged at the outgoing plane of the transmission substrate 22 in a periodic structure in an up-and-down direction. The image display plate has lenticular lenses 31 in which unit lenses are arranged in a periodic structure in a horizontal direction at an incident plane of the transmission substrate 32 of a scattering characteristic capable of scattering light fluxes.

Abstract: A rear projection screen of the type which allows a projected light beam incident thereon to pass therethrough to a viewer side includes a Fresnel lens sheet, and a lenticular lens plate opposed to the Fresnel lens sheet. The Fresnel lens sheet is in the form of a thin sheet made of a resin, and converts the projected light beam incident thereon into substantially collimated light to direct the substantially collimated light outwardly toward the viewer side. The lenticular lens plate refracts the projected light beam incident thereon horizontally or vertically.

Abstract: A thin rear projection television using a wide angle lens system is provided. In an embodiment, a fresnel screen is used in which there are at least two spatial zones in the screen with different properties. The at least two zones may be adapted to compensate for the variation in input angle.

Abstract: A light managing screen may provide a rear projection screen, front projection screen or component thereof. The screen may comprise a polymeric composition including a first polymeric material, and a second polymeric material disposed as a plurality of elongated structures within the first polymeric material. Each elongated structure has a major axis and the major axes are substantially aligned. The first polymeric material has an index of refraction that differs by at least 0.01 from an index of refraction of the second polymeric material. In some instances, a pressure sensitive adhesive material is selected as the first polymeric material. The orientation of the elongated structures and the difference in indices of refraction results in the polymeric composition scattering light asymmetrically.

Abstract: A rear projection screen does not block the image light and provides a perfect complete image. The screen includes a Fresnel lens, and a cylindrical lens array consisting of a plurality of cylindrical lens elements. These elements are independent from each other and in parallel, and arranged closely between adjacent cylindrical lens element, so that there are no luminous flux loss therebetween. A strengthening area, which is provided with a rigid reinforced member connecting with cylindrical lens elements on two sides thereof, is formed on the are a being from their contact portion to the image-light exist-side surface between adjacent cylindrical lens elements. An ambient light absorbing portion is formed at the image-light exit side in the strengthening area.

Abstract: The ultra-thin rear projection display device described herein includes a lens system and one or more planar mirrors that are parallel to a screen on which an image is to be displayed. The screen may be a Fresnel lens having a plurality of bumps on the output surface to reduce the visibility of a stray light image. The Fresnel lens may have a diffusion layer on the output side of the Fresnel lens.

Abstract: A rear projection display device is provided. In an embodiment, the display device includes a laminate screen including a Fresnel lens lamina having a non-planar input surface, a substantially planar output surface and a first index of refraction. The laminate screen further may include a diffusion screen lamina having a substantially planar input surface, an output surface and a second index of refraction. The diffusion screen lamina may be in optical communication with the Fresnel lens lamina. Moreover, the planar output surface of the Fresnel lens lamina and the planar input surface of the diffusion screen lamina may be in facing relationship.

Abstract: In order to achieve a great improvement in light utilizing efficiency, a projection type display apparatus for obliquely projecting an original image onto a screen includes a first projection optical system for projecting light from an original picture and forming an intermediate image having trapezoid distortion caused therein, a second projection optical system for obliquely projecting the light from the intermediate image onto a surface for projection so as to cause converse trapezoid distortion, and re-imaging it, and a light deflecting element for deflecting the optical axis of the first projection optical system so that the optical axis of the first projection optical system deflected by the light deflecting element is made to substantially coincide with the optical axis of the second projection optical system.

Abstract: A transmission screen includes a Fresnel lens sheet through which light is projected from a projector to a lenticular lens sheet arranged on a viewer side, as approximately parallel light, and the lenticular lens sheet receiving light passing through the Fresnel lens sheet, and emitting the approximately parallel light while horizontally widening, by means of a group of cylindrical lenses which are horizontally in parallel, wherein in at least one of the Fresnel lens sheet and the lenticular lens sheet, on a surface of a light diffusing substrate, in which a light diffusing material is dispersed, irregularities which constitute a lens section is formed, and in the light diffusing substrate, dispersion density of the light diffusing material differs in at least two layers in the thickness direction.

Abstract: Method and apparatus for collimating light of projected images establishes limited few designs of Fresnel lenses to accommodate conventional image projection system having a wide range of sizes of viewing screens for the projected images. A multi-layer image-enhancing filter is disposed to receive substantially collimated image light exiting the Fresnel lens. A light-transmissive structure includes a substrate layer supporting a single layer of contiguously-arranged beads of light transmissive material disposed on an incident surface of the substrate layer. A Fresnel lens includes angularly-pitched segments on one surface and an array of a plurality of elongated lenses aligned in one direction on an opposite surface of the Fresnel lens for passing a projected light image therethough to the layer of beads on the substrate layer.

Abstract: To provide a lenticular lens sheet where separation, or wrinkling or undulation is prevented from occurring in a manufacturing stage and a projection screen with the lenticular lens sheet. Constructed is a composite lenticular lens sheet that is disposed on a light-emission surface side of the Fresnel lens sheet and on the light-incidence surface side and on the light-emission surface side of that there are used respectively different plastic materials. In this composite lenticular lens sheet, the following assumption is made. Regarding the light emission surface side material, Ta(° C.) represents the glass transition point; Am(1/° C.) represents the coefficient of linear expansion at a temperature equal to or higher than Ta; and As(1/° C.) represents the coefficient of linear expansion at a temperature equal to or lower than Ta, while, regarding the light-incidence surface side material, Tb(° C.

Abstract: The ultra-thin rear projection display device described herein includes a wide angle lens system and one or more planar mirrors that are parallel to a screen on which an image is to be displayed. In one embodiment, the screen that has multiple groove angles to provide better illumination than screens with a single groove angle.

Abstract: A screen for allowing light generated by a light source and modulated by a picture display device having pixels laid out to form a matrix to produce an image thereon to be projected on the screen as an enlarged picture. The screen has a Fresnel lens sheet forming Fresnel lenses at an emission side, a first member for receiving light emitted from the Fresnel lens sheet having light passing windows, and a plurality of light absorbing layers and a second member placed on the emission side of the first member. A pitch of the light absorbing layers is made smaller than a pitch in a first direction of pixels projected and enlarged on the screen, and a pitch in a second direction of the pixels is at least twice of a pitch of the Fresnel lenses.

Abstract: The invention relates to a lens sheet applicable to a screen for a pixel type projection TV characterized in high quality and definition and a simple producing method thereof. The inventive lens sheet has a shielding layer without any axial misalignment at front and rear sides. The lens sheet comprises a lens portion with a plurality of lens elements arranged in at least one side and a shielding layer provided in a non-transmitting portion of a light radiation plane, in which the shielding layer is provided on a layer made of a cured photo-curing composition (A). The photo-curing composition (A) is composed of 100 weight parts of photo-curing resin composition (a) having a surface free energy of 30 mN/m or more and 0.01 to 10 weight parts of compound (b) having a surface free energy of 25 mN/m or less.

Abstract: Screen apparatuses are provided which include a first lens or holographic optical element layer and a second mask layer. The first layer substantially collimates image light rays to impinge on the mask layer. The mask layer provides an array or matrix of projecting members. Each of the projecting members receives and focuses the substantially collimated light rays to corresponding focal points. The mask layer includes a mask that blocks light transmission except where openings are located. The openings allow the light focused through the focal joints to substantially pass through the mask to form an image. The screen apparatuses can be advantageously employed in display apparatuses.

Abstract: A Fresnel lens has a plurality of pitch areas in which a plurality of hybrid type prism portions are arranged. Each hybrid type prism portion has a refraction type prism portion and a total reflection type prism portion. In the refraction type prism portion, a ray of incident light Li1 of an incident angle “a” is refracted twice and goes out as a ray of outgoing light Lo1 of an outgoing angle “f”. In the total reflection type prism portion, a ray of incident light Li2 of the incident angle “a” is refracted, totally reflected and refracted in that order and goes out as a ray of outgoing light Lo2 parallel to the ray of outgoing light Lo1.

Abstract: A Fresnel lens sheet has an entrance surface provided with a plurality of total-reflection Fresnel lens elements. Each of the total-reflection Fresnel lens elements has a light-receiving facet and a total-reflection facet that deflects part of or all the image light fallen on the light-receiving facet in a desired direction. The Fresnel lens sheet meets a requisite condition expressed by an expression: A1≦0.6T1/L1, where L1 (mm) is the horizontal length of the Fresnel lens sheet, T1 (mm) is the thickness of the Fresnel lens sheet, and A1 (%) is maximum elongation percentage of the Fresnel lens sheet at which the Fresnel lens sheet lengthens due to moisture absorption. The Fresnel lens sheet includes a Fresnel lens element sheet, and an auxiliary sheet attached to the exit side of the Fresnel lens element sheet. The Fresnel lens element sheet enables efficient molding-removing work for removing the Fresnel lens element sheet from a mold.

Abstract: The present invention relates to a diffusion sheet for use in a transmission-type screen comprising a main diffusion layer having an incidence surface and an emergence surface which are parallel to each other, the main diffusion layer diffusing a light, which is substantially perpendicularly incident on the incidence surface, in a diffusion direction to be emitted from the emergence surface. A plurality of groove channels each having a substantially V-shaped cross-section are disposed in parallel to one another on the emergence surface of the main diffusion layer, and each groove channel are formed by two planes, curved surfaces, or bent planes which are joined to each other in the main diffusion layer. A region sandwiched between the adjacent two groove channels provides a rib with a substantially trapezoidal cross-section, while the planes, curved surfaces, or bent planes which form each groove channel provide side surfaces of the rib. The light substantially.

Abstract: Color lights from image projecting sections (207) that enlarge and project images of red, green and blue, respectively, are made incident on a transparent screen at different angles of incidence, so that image synthesis is carried out. The color lights projected are converted into telecentric light by a Fresnel lens (211), and after principal rays of the respective color lights are converted into substantially parallel rays by a color shading eliminating means (219) provided with lenticular lenses on both sides thereof, the rays are incident on a light diffusing means (224). The light diffusing means (224) is formed with a transparent substrate sheet and a plurality of transparent micro beads made to adhere onto a light-incident surface of the substrate sheet with an opaque adhesive. Image light passes through light transmitting portions between the substrate sheet and the micro beads to be diffused.

Abstract: A rear projection screen includes a first and second optical components. The second optical component includes a first surface on which a plurality of cylindrical convex portions are formed, and a second surface opposite to the first surface. In this case, a plurality of concave portions are formed on the second surface, and each concave portion is positioned respectively corresponding to the place between each cylindrical convex portion. A light absorbing material is applied to each concave portion. Furthermore, the invention also discloses an optical component and a method for manufacturing the optical component.

Abstract: To provide a lenticular lens sheet where separation, or wrinkling or undulation is prevented from occurring in a manufacturing stage and a projection screen with the lenticular lens sheet. Constructed is a composite lenticular lens sheet that is disposed on a light-emission surface side of the Fresnel lens sheet and on the light-incidence surface side and on the light-emission surface side of that there are used respectively different plastic materials. In this composite lenticular lens sheet, the following assumption is made. Regarding the light emission surface side material, Ta (° C.) represents the glass transition point; Am (1/° C.) represents the coefficient of linear expansion at a temperature equal to or higher than Ta; and As (1/° C.) represents the coefficient of linear expansion at a temperature equal to or lower than Ta, while, regarding the light-incidence surface side material, Tb (° C.

Abstract: To provide a rear-projection type screen in which, without the need for a tape-attachment operation on the outer circumferential part of the lens sheets, the top of the Fresnel lens can be prevented from being pared by the abrasion caused by the vibration during transportation. A rear-projection type screen according to the present invention is configured from two or more overlapping sheet-like members such as a Lenticular lens sheet 1 and Fresnel lens sheet 2, in which a fixing protrusion 3 is integrally formed in the sheet-like members in such way that neither of the two sheet-like members is displaced from the state in which the two sheet-like members overlap. A protrusion, used to attach the rear-projection type screen to the main body of a rear-projection-type image display apparatus or the screen frame, may be integrally formed in the sheet-like members from which the rear-projection type screen is configured.

Abstract: A projection optical system is used for projecting a light generated by a light source and modulated by a picture display device comprising pixels laid out to form a matrix on a screen as an enlarged picture. The screen is provided with a Fresnel lens sheet placed on an emission side of the picture display device, a first configuration element and a light passing plate fixed on the emission side of the first configuration element. The first configuration element has lenticular lenses and light absorbing layers. The lenticular lenses are provided on an incidence side of a light passing through the Fresnel lens sheet. The light absorbing layers are each provided at a place in close proximity to the focal point of one of the lenticular lenses and are separated from each other by a predetermined distance for forming light passing windows.

Abstract: A television screen is provided with one or more substrates made of a thin film. A number of materials may be used for the film substrate. Further, structures are formed on one or more resin bearing surfaces of the film substrates using a number of techniques, including using patterned rollers to press against the resin bearing film surfaces. The resin can be liquid resin that is cured to set the patterned structures. The thin film results in stronger yet lightweight televisions screens that are safe and easy to handle.

Abstract: To provide an excellent transmissive screen allowing a well-balanced increase in the vertical, horizontal, and oblique viewing angle characteristics for enhancing the viewing angle characteristics, and a rear projector including the transmissive screen. A transmissive screen includes a Fresnel lens portion having Fresnel lens components on its light-exiting surface; and a microlens array portion disposed at the light-exiting surface side of the Fresnel lens portion and having many microlenses on its light-incident surface. The microlenses of the microlens array portion are arrayed vertically and horizontally such that adjacent microlenses have common sides and the microlens array portion is rotated by 45°.

Abstract: An optical device such as an overlay panel for a LCD display, comprises an element of light-transmitting material having a surface configured to form a stepped Fresnel prismatic structure. The light-transmitting material itself or ribbed light refracting element, said element incorporates an array of graded refractive index features adapted to impart light dispersing of diffusing characteristics to the light-transmitting material. In an alternative arrangement, the element of light-transmitting material has a layer configured to form a stepped Fresnel-type surface and an additional layer incorporating such an array of graded refractive index features.

Abstract: A screen for a projection display system. The screen has a Fresnel lens for converting incoming light into parallel light and a Lenticular lens disposed on a surface of the Fresnel lens to change a path of the parallel light from the Fresnel lens, providing a three-dimensional image to a user. The Lenticular lens includes plural pixel lenses corresponding to pixels of the screen. Each of the pixel lenses has a central diffusing portion formed on a light-outgoing portion and a peripheral diffusing portion formed on a peripheral portion of the central diffusing portion.

Abstract: The present invention is a screen, such as is used in back-lit projection screens, having a Fresnel lens laminated to another layer for support. The screen includes a Fresnel lens having an output surface, and a dispersing screen supportingly attached on a first side to the output surface of the Fresnel lens.

Abstract: The invention relates to a translucent screen comprising a sheet element with a first surface and a second surface substantially parallel with the first surface, wherein the first surface comprises a number of lens facets that combine to form a lens system for paralleling diverging light beams that enter into the sheet element. The invention is characterised in that the lens facets contain a refractive agent in a concentration that exceeds the concentration of refractive agent in that part of the sheet element that is located outside the lens facets; and wherein the refractive index of the refractive agent deviates from the refractive index of the material in which the refractive agent is located.

Abstract: A Fresnel lens sheet of the present invention is applicable to a transmission-type projection screen, which comprises a layered structure provided with at least a base material layer, a lens layer formed into a Fresnel lens configuration, an incident surface on which projection light is incident and an light-emission surface from which the projection light is emitted, wherein a total reflection surface is disposed in the layered structure at a position between the incident surface and the light-emission surface, the total reflection surface totally reflecting a portion of projection light proceeding on an optical path in a direction from the lens layer side toward the base material layer side.

Abstract: The ultra-thin rear projection display device described herein includes a wide angle lens system and one or more planar mirrors that are parallel to a screen on which an image is to be displayed. In one embodiment, the screen that has multiple groove angles to provide better illumination than screens with a single groove angle.

Abstract: A transmission type screen is disclosed. The transmission type screen comprises a Fresnel lens sheet, a lenticular lens sheet provided with convex black stripes on the light-exit surface, and a diffusion sheet having an uneven surface on one side thereof. In the transmission type screen, the uneven surface of the diffusion sheet is joined to the lenticular lens sheet at the top portions of black stripes.

Abstract: Method and apparatus for collimating light of projected images establishes limited few designs of Fresnel lenses to accommodate conventional projection systems having a wide range of sizes of viewing screens for the ted images. A multi-layer image-enhancing filter is disposed to receive Substantially collimated image light exiting the Fresnel lens.

Abstract: A multidirectional single surface optically shaped film is disclosed. The optically shaped film may include a film having only one surface structure with two or more different, overlapping Fresnel patterns formed in the structured surface for use as thin, decorative film.

Abstract: A beaded light dispersing film has a substrate layer, and an optically transparent layer, having a predetermined thickness, disposed over a side of the substrate layer. Optically transmitting beads are arranged to penetrate at least partially into the transparent layer to define clear apertures at interfaces between the beads and the transparent layer. The bead radius is greater than the predetermined thickness. An absorbing layer is disposed on the transparent layer, in interstices between the beads. A method of manufacturing the film includes disposing optically transparent beads partially in an optically transparent layer disposed over a transparent substrate layer. The optically transparent layer has a thickness less than half a diameter of a transparent bead. An absorbing layer overlies the optically transparent layer.

Abstract: The invention relates to a display device for displaying visual information, comprising: at least one image-forming element; at least one light source for generating a light beam, which in cooperation with the image-forming element produces an illuminated image; optical means for processing the light beam and/or illuminated image; and a projection surface for receiving the illuminated image, wherein the image-forming element is flat and the projection surface forms at least a part of a cylinder wall.

Abstract: Rear projection screens use lenticular lens films as light dispersing components. A single lenticular lens film includes lenticular lenses having different focal powers, or includes lenticular lenses formed in two dimensional patterns. The lenticular lens films improve the brightness uniformity over the entire screen as viewed by a viewer who is located at a specific position. The specific position is typically selected to be the most probable location of the viewer for the particular application.

Abstract: To provide a rear-projection type screen in which, without the need for a tape-attachment operation on the outer circumferential part of the lens sheets, the top of the Fresnel lens can be prevented from being pared by the abrasion caused by the vibration during transportation. A rear-projection type screen according to the present invention is configured from two or more overlapping sheet-like members such as a Lenticular lens sheet 1 and Fresnel lens sheet 2, in which a fixing protrusion 3 is integrally formed in the sheet-like members in such way that neither of the two sheet-like members is displaced from the state in which the two sheet-like members overlap. A protrusion, used to attach the rear-projection type screen to the main body of a rear-projection-type image display apparatus or the screen frame, may be integrally formed in the sheet-like members from which the rear-projection type screen is configured.

Abstract: A screen of a projection television may include a Fresnel lens for converting an incident light beam emitted from an image source into a parallel beam, a lenticular lens formed by sequentially arranging multiple lens elements having a column shape parallel to one another for forming an image from the parallel beam output from the Fresnel lens and spreading the formed image, and a protective panel installed on the front surface of the lenticular lens for protecting the lenticular lens. The Fresnel lens may include a base substrate and a lens unit contacting one side of the base substrate, patterns having a saw-toothed shape formed on a surface of the lens unit facing a lenticular lens, and portions of each pattern corresponding to a sharp portion of a sawtooth may be a processed curved surface having a predetermined curvature.

Abstract: A rear projection screen 3 includes a single Fresnel lens sheet 11 having the function of converging projected light entering from its back side and allowing the converged light to emerge from its observation side, or a combination of the Fresnel lens sheet 11 provided on the back side and a lenticular lens sheet 21 provided on the observation side. The Fresnel lens sheet 11 has a Fresnel lens 12 on its observation-side surface and a matte surface 13 as its back-side surface. The matte surface 13 of the Fresnel lens sheet 11 has a specified degree of matting and shows antireflection properties. Preferably, the Fresnel lens sheet 11 has a haze value in a specified range. More preferably, the matte surface 13 of the Fresnel lens sheet 11 has a gloss in a specified range.

Abstract: A reflective projection screen comprising multiple horizontal row segments facilitates directing a reflected image to provide a wide horizontal viewing angle within a relatively narrow vertical viewing band. Each horizontal row segment has a surface that distributes incident light over a wide horizontal angle. The vertical inclination of each row segment is varied from the top to the bottom of the screen to direct the light vertically.

Abstract: A rear projection system provides for reduced cabinet depth by folding the optical path with polarization sensitive mirrors. In one aspect, the projector outputs linearly polarized light to a quarter-wave polarizing sheet, which circularly polarizes the projector output. A mirror directs the projected light back through the quarter-wave material to a polarization-dependent reflector. The light has a reflective polarization state. The polarization-dependent reflector reflects the light back to the quarter-wave material and mirror. Upon traversing the path a second time, the light is in a transmissive polarization state.

Abstract: A system for suspending a video projection screen includes the principles of physical independence, or a somewhat “floating system,” employing at least some thermal expansion matching, centroid expansion dimension splitting combined with front to back progressive dimensional freedom, as well as corner gussets and rear corner brackets which contribute to the overall independence of each element of the system. The system of support provide clearance space from the rear of the system and which progressively provides a final touching clearance at the projection end of the system which has the minimum spacing between adjacent acrylic members to provide a nearly seamless system. In one embodiment, an expanse of typical acrylic screen material which may be either case, such as a Fresnel, or lenticular-fresnel material, or extruded, such as a diffusion material, having a thermal expansion of about 34×10−6 inch/inch/° F.

Abstract: A rear projection type screen is provided with a Fresnel lens and a lenticular lens, for use with a light valve having pixels. The rear projection type screen has such lens pitches that the secondary moiré pitch PMM indicated by the following equation is 3 mm or less, taking the lens pitch of the Fresnel lens as PF (mm), the lens pitch of the lenticular lens as PL (mm), and the pitch of the pixels in the light valve as PS (mm).

Abstract: A lenticular screen component of a rear projection display screen has lenticular elements formed on a viewer surface. Identical lenticular elements cover the entire lenticular screen component and are repeated horizontally at a constant displacement. A given lenticular element includes a pair of reflective side portions and a refractive tip portion interposed between the side portions. One of the pair of side portions forms a sloped region at a joint between the one side portion and a side portion of an adjacent lenticular element. The sloped region is at an angle in a range between 5 and 15 degrees with respect to the first axis. The one side portion is covered with a reflective coating in at least a region of the one side portion that includes the joint. The pair of reflective side portions reflects light rays incoming from a projector towards the refractive tip portion for refracting the reflected light rays via a surface of the refractive tip portion facing a viewer.